Malicious PDF — malware analysis report

Static analysis result for SHA-256 538e0aaafe8686c1…

MALICIOUS

PDF

60.1 KB Created: 2020-08-08 12:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dda3fa7955ee3b07423f80b27f2a9c7 SHA-1: 6779521e57de19a5a92368fdce6fe21370d25bec SHA-256: 538e0aaafe8686c1744002e4c4d26350c2e3bb5df2ddab08beae7a91ada3a60a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for downloading a novel, which aligns with the malicious redirector's purpose. The presence of a link farm heuristic further indicates an attempt to distribute malicious content.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=download+novel+bridge+to+terabithia+bahasa+indonesia+pdf
    • http://wudujoki.marchmontpark.com/uploads/1/3/0/7/130776728/wisofixumirig.pdf
    • http://files.duhamelsomerville.org/uploads/1/3/0/8/130813095/5435361b.pdf
    • http://files.angardencentre.co.nz/uploads/1/3/1/3/131380469/jupuk.pdf
    • http://files.distrixgames.com/uploads/1/3/1/4/131409210/josiza_jujefeluneli.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/kezedanal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/2204355_i_m_feeling_lucky.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/47724192579.pdf
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/nomenclatura_de_cetonas.pdf
    • https://cdn.shopify.com/s/files/1/0440/7672/8485/files/85641304881.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/liwuweravizena.pdf
    • https://cdn.shopify.com/s/files/1/0435/1351/2100/files/worship_songs_chords_and_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/6708292435.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/56483716659.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/madugipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/megabytes_to_bytes.pdf
    • https://cdn.shopify.com/s/files/1/0440/7279/6325/files/12528332941.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aaee.bin
619e244c37f5a04ddb77772e21fab99140ea1b49b5f0032de6e7e613dd88eaba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAEE 5596 bytes
font_01_sfnt_off0000be05.bin
93b82733b189e74cc156f783ddb32fb2f3b6927e5cbe97c3018da2b6ad2d4577		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE05 10832 bytes

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